Riffing on one of Ai’s more notorious pieces, which included photos of himself flipping off Tiananmen Square and Beijing’s Olympic Stadium, the producers of the recent documentary Ai Weiwei: Never Sorry are “inviting fans of the artist to submit photographs of themselves giving a middle-finger salute to symbols of injustice … The photos will be assembled into a mosaic and given to Ai upon his release” from house arrest this month.